A multinational firm (MNF) operates in multiple countries through subsidiaries, joint ventures, and franchising to gain technological advantages, develop international brands, access cheap labor, and increase market share. Major MNFs include Walmart, Royal Dutch Shell, Exxon Mobil, BP, and Toyota. While MNFs create jobs and investment in host countries, they can also relocate production sites and transfer capital abroad. Success depends on political, economic, social, and technological factors in different nations.